Scouring-machine.



' W. A. PARMENTER.

' SUOURING MACHINE.

APPLICATION FILED JUNE 19, 1908.

Patented Au 31, 1909.

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. W. A. PARMENTER.

SCOURING MACHINE. APPLICATION nun Junie, 1900.

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W. A. PARMENTER.

soounme MAOHINE. APPLICATION FILED JUNE 19, 1908. 932,638. Patented Aug. 31, 1909.

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PATENT OFFICE.

WILLIAM A. PARMENTER, or snocx'roiv, MASSACHUSETTS, ASSIGNOR T0 CHARLES s. PIERCE,

01* BR'OGKTON, MASSACHUSETTS.

mums-MACHINE.

chine to be employed in the manufacture of boots and shoes to scour both surface and the edges of box-toes and the like. V In the manufacture ofshoes, it is desir-' able that the pieces of'leather employed to produce the box-toe be thick in the center and grow gradually thinner toward the edges. The box-toe should be as thin as possible around the edge and at thesame time have an even and uniform thickness without an irregular or ragged edge.

Heretofore in the manufacture of shoes it has been customary'to pass the blanks from which the box-toes are to be made. through a skiving machine which trims the edges of the blank to a required thickness. After being operated upon by the skiving machine,

it has been customary to grind the box-toes to the desired thickness at its edge and at the same time scour or smooth all'the under surface of the blank by holding the blank against a rapidly revolving abrading or scouring roll commonly covered with sand paper or the like. My present invention affords means by which this operation may be performed mechanically, it being only necessary for the operator to feed the blanks to the machine. By the use of my new and improved machine, box-toes may be scoured more uniformly thanhas heretofore been possible even by the best operator. The operation is very rapid and-a skilled operator is not required so that by the employment of the machine embodying my invention the expense ofiproducingithis part of a boot or shoe is very materially reduced.

While I have described my invention as embodied in amachihe especially adapted for scouring box-toes, it is equally adapted forthe production of any other parts of a boot or shoe, the edge or edges of which require to be thinned or ground down such for instance as the counter or heelstiifener. The invention will be fully understood from the following description taken in con Specification of Letters Patent. 1 Applicationfiled June 19, 1908'. Serial No. 439,424.

Patented Aug. 31, 1909.

nection with the accompanying drawings, and the novel features arepointed out and clearly defined'in the claims at the close of the specification.

In the drawings,Figure 1 is a front elevation of a machine embodying my invention. Fig. 2 is a side elevation thereof. Fig. 3 is a vertical section on line 33 of Fig. 1 looking in the direction of the arrows. Fig. 4 is a section on line H, Fig. 1, looking down. Fig. 5 is a side elevation partly in section of a portion of the machine, certain of the parts being in a different position. Fig. 6 is a detail of the clamping mechanism.

Referring now to the drawings and more particularly to Figs. 1, 2 and 3, there is seen at A the base or pedestal of the machine, said base or pedestal being of a height convenient to support the various parts of the machine on a level sli 'htly above that of the operators elbows. n the pedestal A is supported the table B having thereon a pair of uprights C, C, between which are supported the parts of the machine which operate upon the blanks.

- At Dis shown a scouring roll mounted on the shaft Ein'boxes F in the said uprights C, C. The outer end of the shaft E is supplied with a pulley G which is driven from any suitable source of power. In pactice I find it desirable to rotate the shaft E at a a speed of about 2,800 revolutions per minute. The construction of the scouring or sandpaper roll D is clearlyseenin Fig. 3. It is provided with some suitable center 11 about which is a layer of felt 18 upon which the sandpaper of other abrasive material 14 is yieldingly supported. The sandpaper 14 is fastened to the said roll by being pinched between the parts of the pulley in the well known manner.

The scouring roll D is adjustable by hand vertically in the following manner :--The boxes F are constructed to slide vertically in theupright Con ways 16 and are moved up and down by means of screws 17 engaging the said boxes F and the upper end of the said screws 17 are furnished with bevel gears 18 meshing with otherbevel gears 19 on a cross shaft 20 supported on brackets 21, the said shaft 20 being rotated by a hand wheel 22. As the screws 17 are alike, it will be seen that the rotation of the hand wheel 22 moves'both ends of the shaft E up and down article to passa s eed tableer whiclris shown ee a ea-inner the screws 17 which engage *th'dsaid'turii '5 buckles 23 being screw-threaded inopposite' g p shown at 55 to receive the stud 56. The podirections. 7 h

, Beneath the scouring roll D and mounted upoir' aish'aft H; is'tlie'matriX K upoirwhieh the box-toe or other piece of leather tc be operated upon is supported during the scour-- pig-operation. flhe matrix shaftH is caused to rotatein the following manner. On the main shaft Eis located a pulley 26 which is preferably narrow and has a V-shaped rim to contain a round belt27 The belt 27 runs 'oyersa pair {of adjustable idle pulleys 28 which 'seri te-to-turn thebeltanddzeep it tight,-andthen over one of the pulleys 29, 30

v and3l on the Vertical stud or shaft 32 supzo pbr'tedon the under side of the table B. rant-o the saidpulleys 29,30, 31 and carried on stud-shaft- 32 is apinion 33 which ineshes-witha gear34: on the vertical shaft 35. 'VThe upper endof said vertical shaft-35 25 is'proyided a worm 36 meshing with a s gma gear 37 on them-atrix shaftH. From awa e ess w ll b s en ha he m t i Shaf is a se o rot te ve y low y a compared with the scouring roll D and that V 30the sp ed of rotation may bevaried in accorda'nce with the size of whichever of the pulleys 29, 31, the belt .27 is running 7 V framsght em thirty revolutions a minute 3;; may be given to the matrix K butthis speed bo i-to'e which is being operated upon. f 'The matrix K'is semicylindrical (see Figs. 3' and 5)f"and is provided upon its periphery 41) with adepr'ession or indentation 338 in which the articldlies while it is being operated The shape-anddepth'of the depres- 138W w h ze and shap of th I lie scoured. The article to be 4 5, scoured is heidappn the matri XK by means dr pery of jaws, one of which is formed by roughing apoi tion of thematrix K, as shown at 39 ainc l the other of which isa movable piece pivoted on a rockshaf t ll on the 5 0 of the matrix K. The said inoyable jaw 40 is n'ormallyheld close by means ot-the leaf springs 42, 43', secured at 4:4 tothe-matrix K; but the said jaw is opened once for each revolution of the matrix K by means of a 5,5 cam 45 fastened to the frame of themachine and engaging an arm 46 on the rock shaft 41 onwhich the movable jaw 40. is pivoted. Th pen f t eiaw .0 im d y th DO.- sition of the cam 45 and occurs as thejaws The a rticles to be scoured are pressed; firmlyinto the depression'or, indentation 38 in the matrix by means of a seriesof; flexible brushes 49 supported upon EtIfOClQSllitftfiO 6 s l i tnst ned by meai ot a ea -spring 51. Said rock shaft 50 is supported in the brackets 52, .52, on the uprights Q, and tension on 'the flexiblebrushes 49' is determin'edby the position of an arm 54: on the rock shaft 50, said arm being slotted as 'sitionof the arm 54 is changed by means of then'u'tshfi'l, the spring 562 servingto maintai nthe arm 54 against the nuts 561.

---The piece to be scoured P is fed to the matrix K by means-ofa reciprocating table R, plainly seen in section in Fig. 3 and in plan in Fig. 14. This table consists of an upperbed plate 57 upon which the work P isiplacedjhaving oneedge against the'studs or stops 58, 5.9; and another edge against the stop 60 which is adjustable on the screw 61. Thesaid 'up perbed pla to '57 ismounted on the slide62- and is adjustable thereon by means of the screw, 63 movable in the slot 64. The slide 62 is reciprocated -by meansofa crank pin 65 workii in a cam groove 66 in the said slide62. aid crank pin 65 is carried on adisk 67 on the upper end of a Verticalshaft'68 which is caused to rotate once for each rotation of the matrix shaft H by meansof two sprocketwheelsof equal-sizefifil :ind'ZOQ-a chain 71, and a pair of miter gears 72, and '73, thelast mentioned of said miter gears being. on an extension of the matrix shaftH (see Fig.1). "Fromthe v a a foregoing it will be seen that'thcsaid table up n-C1 pr I d ha a speed o R is given one complete reciprocation for 1 each rcvolutionof thezmatrix K but thatthe I a v V movement of-the table R is slightlyretardcd I will be Varied according to the size of the,

at one point b'yf means of theshape of the cam 'slot 66 in orderthat thepiece P maybe presented to the gripping jaws more "certainly. to

The operation'of my machine is exceedingly'siniple. -The sandpaper roll Dv andithe matrix 'K revolve constantly at" the proper speed as previously described and'ithc table R constantly reciprocates for the purpose of presenting tl eboii-toes or other pieces to be operated 'upon toithe aws of the matrix roll. The operator places the box-toe initsproper p'ositionr'a-s determined by the stops on the ;rcciprocating :table R, retaining it in posi 1tionby the pressure of hisfingers 'uutil 'it is }cau-ght by the j-aws on the matrix. VVhenin position "oii' thefreciprocating table R, its front end projects over. the end-- of said table as shown in Fig: 4G. Bythe forwardmovcment of-the table the projectingendi of the brushes 49; crowd the piece of: leather Pfinto the iiidentation 38*: in the matrix so. that itiis properly presenteduto the scouring wheel 1D. The scouring' wheel D, thereupon scours the leather, *tliinning', the edges and smoothing the surface as desired taking off. all partsof the leather which lie abovethe level of the matrix. Just before the matrix completes its revolution, the jaws are opened by the and cooperating with said first mentioned jaw to hold the work.

2. In a machine of the character described,

the combination of a scouring roll, a matrix having a semi-cylindrical exterior surface with an indentation therein to receive the work and having a flattened side the edge of which forms a jaw, a movable jaw pivoted" on said flattened side and cooperating with said first mentioned jaw to hold the work,

and a spring acting on said movable close the said jaw upon the work. i

3. In a machine of the character described, the combination of a scouring roll, a matrix having a semi-cylindrical exterior surface with an indentation therein to receive the work and having a flattened side the edge of which forms a jaw, a movable jawpivoted on said flattened side and cooperating with said first mentioned jaw to hold the work, a

jaw to spring to hold said movable jaw normally closed, and means to open said jaws at predetermined intervals.

4-. In a machine of the character described,

the combination of a scouring roll, a matrix having a semi-cylindrical exterior surface with an indentation therein to receive the work, and havinga flattened side, the edge of said flattened side forming a jaw, a movable jaw pivoted on said flattened side and cooperating with said first mentioned jaw to hold the work, and a yielding brush to press the work into the indentation in the matrix just before it is operated upon by the scouring roll. 7 v

5. In a machine of the characterdescribed, the combination with the scouring roll and rotating matrix having a fixed jaw thereon, of a movable jaw pivoted on the said matrix, a spring engaging the said movable jaw and normally holdingit closed and a cam on a fixed part of the machine operating to move the said movable jaw against the action of the said spring during a portion of the revolution of thematrix.

6. In a machineof the character described, the combination of a scouring roll, a rotating matrix, jaws on the said matrix to hold the work, and feeding mechanism to insert the work between the said jaws at the proper time.

7. In a machine of the character described, the combination of a scouring roll, a matrix having aws thereon to hold the work, and a reciprocating table to present the work to the said jaws.

8. In a machine of the character described, the combination of a scouring roll, a rotating matrix having jaws thereon to hold the work, and a reciprocating table to present the work to thesaid jaws, the said table .making one complete reciprocation for each revolution of the matrix.

9. In a machine of the character described,

the combination of a scouring roll, a matrix,

jaws thereon to hold the work, a matrix shaft, a reciprocating table to present the work to the said jaws, and means to give the said table one complete reciprocation for each revolution of the matrix, comprising a crank and crank pin engaging the table, a crank shaft and a train of gearing connected with the matrix shaft and the crank shaft.

10. In a machine of the character described, the combination of a scouring roll, a matrix,jaws thereon to hold the work, a reciprocating table to present the work to the said'jaws, means for actuating the said table comprising a crank pin engaging a cam slot in the table whereby the reciprocation of the table is retarded during a portion of the stroke. j j

' 11. In a machine of the character described, the combination of a scouring roll, a cylindricalmatrixhaving an indentation in the surface thereof, jaws on the said matrix to hold the work while it is being operated upon by the scouring roll, means for adjust-.

ing the saidscouring roll bodily vertically and means for independently adjusting vertically the ends of the scouring roll.

In testimony whereof I affix my signature,

in presence of two witnesses.

WILLIAM A. PARMENTER. 

